⚡️(frontend) render full-screen warning only for the local participant

Restrict the full-screen warning to the local participant tile.

Previously, mounting it on every participant tile meant that when
the local participant toggled their camera or microphone, the
warning re-evaluated and triggered a re-render on every tile.

src/frontend/src/features/participantTile/components/ParticipantTile.tsx

@@ -117,7 +117,9 @@ export const ParticipantTile: (
     <div ref={ref} style={{ position: 'relative' }} {...interactiveProps}>
       <TrackRefContextIfNeeded trackRef={trackReference}>
         <ParticipantContextIfNeeded participant={trackReference.participant}>
+          {trackReference.participant.isLocal && (
             <FullScreenShareWarning trackReference={trackReference} />
+          )}
           {children ?? (
             <>
               {isTrackReference(trackReference) &&